feat(pmoparadise): migrate channel IDs to u16 and use dynamic registry

Replaces the static ALL_CHANNELS array with a dynamic, thread-safe registry fetched via the Radio Paradise API. Migrates all channel identifiers from u8 to u16 across client, config, server, and example modules to support expanded ID ranges. Updates validation to runtime lookups, converts builders to async, and adds local cover caching. Bumps version from 0.3.61 to 0.3.62.

pmoparadise/examples/play_and_cache.rs

@@ -74,7 +74,7 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
         std::process::exit(1);
     }
 
-    let channel_id: u8 = match args[1].parse() {
+    let channel_id: u16 = match args[1].parse() {
         Ok(id) if id <= 3 => id,
         _ => {
             eprintln!("Error: channel_id must be a number between 0 and 3");